Towards suppression of all harmonics in a polyphase multipath transmitter


Subhan, Saqib and Klumperink, Eric A.M. and Nauta, Bram (2011) Towards suppression of all harmonics in a polyphase multipath transmitter. In: IEEE International Symposium on Circuits and Systems, ISCAS 2011, 15-18 May 2011, Rio de Janeiro, Brazil (pp. pp. 2185-2188).

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Abstract:This work proposes a direct conversion transmitter architecture intended for cognitive radio applications. The architecture is based on the poly-phase multipath technique, which has been shown to cancel out many of the harmonics, sidebands and nonlinearity contributions of a power up-converter using a large number of signal paths. This work proposes a design only using 8 paths which is able to achieve <−40dBc harmonic suppression for all harmonics, including the dominant 7th and 9th harmonic. This is done with a combination of duty cycle control of the Local Oscillator (LO) waveform and tunable filtering with only a first order roll-off.
Item Type:Conference or Workshop Item
Copyright:© 2011 IEEE
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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